2 * Copyright (c) 2007-2012 Nicira, Inc.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of version 2 of the GNU General Public
6 * License as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 #include <linux/hardirq.h>
20 #include <linux/if_vlan.h>
21 #include <linux/kernel.h>
22 #include <linux/netdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/ethtool.h>
25 #include <linux/netdev_features.h>
26 #include <linux/skbuff.h>
27 #include <linux/version.h>
35 #include "vport-internal_dev.h"
36 #include "vport-netdev.h"
38 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)
39 #define HAVE_NET_DEVICE_OPS
46 static struct internal_dev *internal_dev_priv(struct net_device *netdev)
48 return netdev_priv(netdev);
51 /* This function is only called by the kernel network layer.*/
52 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
53 static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev,
54 struct rtnl_link_stats64 *stats)
57 static struct net_device_stats *internal_dev_sys_stats(struct net_device *netdev)
59 struct net_device_stats *stats = &netdev->stats;
61 struct vport *vport = ovs_internal_dev_get_vport(netdev);
62 struct ovs_vport_stats vport_stats;
64 ovs_vport_get_stats(vport, &vport_stats);
66 /* The tx and rx stats need to be swapped because the
67 * switch and host OS have opposite perspectives. */
68 stats->rx_packets = vport_stats.tx_packets;
69 stats->tx_packets = vport_stats.rx_packets;
70 stats->rx_bytes = vport_stats.tx_bytes;
71 stats->tx_bytes = vport_stats.rx_bytes;
72 stats->rx_errors = vport_stats.tx_errors;
73 stats->tx_errors = vport_stats.rx_errors;
74 stats->rx_dropped = vport_stats.tx_dropped;
75 stats->tx_dropped = vport_stats.rx_dropped;
80 /* Called with rcu_read_lock_bh. */
81 static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
83 if (unlikely(compute_ip_summed(skb, true))) {
88 vlan_copy_skb_tci(skb);
91 ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
96 static int internal_dev_open(struct net_device *netdev)
98 netif_start_queue(netdev);
102 static int internal_dev_stop(struct net_device *netdev)
104 netif_stop_queue(netdev);
108 static void internal_dev_getinfo(struct net_device *netdev,
109 struct ethtool_drvinfo *info)
111 strlcpy(info->driver, "openvswitch", sizeof(info->driver));
114 static const struct ethtool_ops internal_dev_ethtool_ops = {
115 .get_drvinfo = internal_dev_getinfo,
116 .get_link = ethtool_op_get_link,
117 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
118 .get_sg = ethtool_op_get_sg,
119 .set_sg = ethtool_op_set_sg,
120 .get_tx_csum = ethtool_op_get_tx_csum,
121 .set_tx_csum = ethtool_op_set_tx_hw_csum,
122 .get_tso = ethtool_op_get_tso,
123 .set_tso = ethtool_op_set_tso,
127 static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
132 netdev->mtu = new_mtu;
136 static void internal_dev_destructor(struct net_device *dev)
138 struct vport *vport = ovs_internal_dev_get_vport(dev);
140 ovs_vport_free(vport);
144 #ifdef HAVE_NET_DEVICE_OPS
145 static const struct net_device_ops internal_dev_netdev_ops = {
146 .ndo_open = internal_dev_open,
147 .ndo_stop = internal_dev_stop,
148 .ndo_start_xmit = internal_dev_xmit,
149 .ndo_set_mac_address = eth_mac_addr,
150 .ndo_change_mtu = internal_dev_change_mtu,
151 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
152 .ndo_get_stats64 = internal_dev_get_stats,
154 .ndo_get_stats = internal_dev_sys_stats,
159 static void do_setup(struct net_device *netdev)
163 #ifdef HAVE_NET_DEVICE_OPS
164 netdev->netdev_ops = &internal_dev_netdev_ops;
166 netdev->get_stats = internal_dev_sys_stats;
167 netdev->hard_start_xmit = internal_dev_xmit;
168 netdev->open = internal_dev_open;
169 netdev->stop = internal_dev_stop;
170 netdev->set_mac_address = eth_mac_addr;
171 netdev->change_mtu = internal_dev_change_mtu;
174 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
175 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
176 netdev->destructor = internal_dev_destructor;
177 SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops);
178 netdev->tx_queue_len = 0;
180 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
181 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO;
183 netdev->vlan_features = netdev->features;
184 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX;
186 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39)
187 netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
189 eth_hw_addr_random(netdev);
192 static struct vport *internal_dev_create(const struct vport_parms *parms)
195 struct netdev_vport *netdev_vport;
196 struct internal_dev *internal_dev;
199 vport = ovs_vport_alloc(sizeof(struct netdev_vport),
200 &ovs_internal_vport_ops, parms);
202 err = PTR_ERR(vport);
206 netdev_vport = netdev_vport_priv(vport);
208 netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev),
209 parms->name, do_setup);
210 if (!netdev_vport->dev) {
212 goto error_free_vport;
215 dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp));
216 internal_dev = internal_dev_priv(netdev_vport->dev);
217 internal_dev->vport = vport;
219 /* Restrict bridge port to current netns. */
220 if (vport->port_no == OVSP_LOCAL)
221 netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL;
224 err = register_netdevice(netdev_vport->dev);
226 goto error_free_netdev;
228 dev_set_promiscuity(netdev_vport->dev, 1);
230 netif_start_queue(netdev_vport->dev);
236 free_netdev(netdev_vport->dev);
238 ovs_vport_free(vport);
243 static void internal_dev_destroy(struct vport *vport)
245 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
247 netif_stop_queue(netdev_vport->dev);
249 dev_set_promiscuity(netdev_vport->dev, -1);
251 /* unregister_netdevice() waits for an RCU grace period. */
252 unregister_netdevice(netdev_vport->dev);
257 static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
259 struct net_device *netdev = netdev_vport_priv(vport)->dev;
262 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
263 if (unlikely(vlan_deaccel_tag(skb)))
274 skb->pkt_type = PACKET_HOST;
275 skb->protocol = eth_type_trans(skb, netdev);
276 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
277 forward_ip_summed(skb, false);
284 const struct vport_ops ovs_internal_vport_ops = {
285 .type = OVS_VPORT_TYPE_INTERNAL,
286 .create = internal_dev_create,
287 .destroy = internal_dev_destroy,
288 .get_name = ovs_netdev_get_name,
289 .send = internal_dev_recv,
292 int ovs_is_internal_dev(const struct net_device *netdev)
294 #ifdef HAVE_NET_DEVICE_OPS
295 return netdev->netdev_ops == &internal_dev_netdev_ops;
297 return netdev->open == internal_dev_open;
301 struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
303 if (!ovs_is_internal_dev(netdev))
306 return internal_dev_priv(netdev)->vport;